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A troubled mega-dairy in Oregon has announced its plans to shut down. After racking up multiple environmental violations, the farm’s owner has been fired and a trustee wants to sell the property.

The U.S. Environmental Protection Agency is proposing to reduce the amount of cleanup required at the Portland Harbor Superfund Site based on new research on the toxicity of the pollution there.

Wildlife managers have asked for permission to kill sea lions at Willamette Falls to save threatened fish. Their attempts to relocate the animals have not solved the problem.

After wildland fires destroyed the trails of a little-known wilderness, people said they'd never be rebuilt. One young couple refused to accept that answer.

The Trump administration is proposing to lower vehicle fuel economy standards and a loosening of power plant emissions targets.

Federal and state energy regulators will hold back-to-back meetings in Portland on Tuesday for a proposal to reclassify some of the high-level nuclear waste at the Hanford Site in Washington.

Songbirds have been in decline for decades, and it's becoming clear that climate change is a factor. Scientists are finding that old-growth forests may help the birds cope with rising temperatures.

Opponents of Portland’s gross receipts tax measure say the initiative could actually cost Portland residents more than initially expected. Proponents aren't buying it.

Only a few hundred Humboldt martens are left, living in small coastal pockets of forest in Northern California and Southern Oregon.